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United States Environmental Protection Agency
Waste Site Cleanup & Reuse in New England
  Serving Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, Vermont & 9 Tribal Nations
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Map this site in Cleanups in My Community
 Plainfield,  Connecticut
 Windham County
 Street Address: Mill Brook Road
 Zip Code: 06374

 EPA ID #: CTD108960972
 Site ID #: 0100201
 Site Aliases:

 Site Responsibility: Potentially Responsible Parties

 Proposed Date 06/24/1988
 Final Date 10/04/1989

Site Description
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Gallup's Quarry is a 29-acre abandoned gravel pit located in a rural area on Tarbox Road, 1 mile south of Plainfield's business district. In the 1970s, the site owner accepted chemical wastes without a permit. Drums and free liquids were dumped at the site, including wastes containing volatile organic compounds (VOCs) and heavy metals. Several of these contaminants were detected in on-site monitoring wells operated by the State from 1978 to 1981, and by the EPA in 1986. The area is rural and residential. Approximately 6,500 people rely on wells located within 3 miles of the site as their sole source of drinking water. A community well is located 4,000 feet away, and the nearest private well is located 1,160 feet from the site.

Threats and Contaminants
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The groundwater is contaminated with VOCs and metals. VOCs, semi-VOCs and polychlorinated biphenyls (PCBs) have been found in on-site soil at concentrations which do not pose an unacceptable direct contact threat. Low concentrations of VOCs have been detected in Mill Brook, which is located approximately 500 feet downgradient of the site. Access to the site entrances is currently restricted, and signs have been posted. Local residents have historically used site resources for recreational purposes, however, a newly constructed (2014) renewable energy plant partially located on the site has significantly reduced access to and recreational use of the unoccupied portion of the site.

Cleanup Approach
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The site is being addressed in two stages: initial actions and a long-term remedial phase which will address contamination at the entire site.

Response Action Status
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Initial Action In 1978, the site was evaluated by the Connecticut Department of Environmental Protection. The State environmental staff and the State Police supervised the removal of waste drums and contaminated soil. The owner agreed to reimburse the State for the removal activities at Gallup's Quarry and at another property that he owned. However, limited soil analyses conducted by the State in 1981 indicated that contaminants still remained at the site.

Entire Site Between 1994 and 1997 the potentially responsible parties investigated the nature and extent of contamination in the soil, groundwater, air, surface water, and sediments and identified potential cleanup alternatives for the site. The results of these studies are documented in the Remedial Investigation Report and Feasibility Study, dated June 1997, which are available for review at the site repository listed below. EPA developed an assessment of the potential risks posed by the contamination. In June of 1997, EPA proposed to the public its preferred alternative to address site contaminants. A final Record of Decision (ROD) for the site was signed on September 30, 1997. The remedy selected for the site includes natural attenuation of contaminants in soil and groundwater, institutional controls to limit the use of the site, posting signs and long-term monitoring of groundwater, soil and surface water until cleanup goals have been attained. Currently the groundwater, soil and river sediments are being monitored. Data is being utilized to assess the progress of natural attenuation at the site. Institutional controls to ensure the affected groundwater at the site will not be used for human water consumption have been completed.

Five-Year Review EPA completed the third five-year review for the site on September 25, 2012, and determined that the remedy continues to be protective of human health and the environment in the short term. There is no current use of, or exposure to, site media containing contaminants in excess of the applicable State and Federal standards identified for the site. A fourth five-year review is scheduled for 2017.

Enforcement HighlightsAn EPA Administrative Order on Consent was signed with twenty-three parties potentially responsible for site contamination in September 1993, which required the parties to conduct the site investigation and to evaluate potential cleanup alternatives. In November 1999, 30 potentially responsible parties signed a Consent Decree with EPA to perform the cleanup action at the site.

Environmental Progress
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Removal of waste drums and contaminated soils in 1978 reduced the most serious and immediate risks of accidental exposure to contamination. The remedial response measures discussed above will further reduce the risks of exposure at the Gallup's Quarry site.

Current Site Status
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The 1997 ROD included natural attenuation, institutional controls, and monitoring as the remedy of choice for the groundwater. A long term groundwater, soil and surface water sampling program began in 2001. This data is being collected to assess the progress of cleanup and to ensure that there are no unacceptable exposures to the public and the environment. Attainment of groundwater cleanup goals is expected to be attained in approximately 5 years. Institutional controls to prevent the use of contaminated groundwater during the cleanup period have been established. The Gallup's Quarry property is currently industrially zoned and a renewable energy plant constructed at the site became operational in January 2014.

As discussed in EPA's third five-year review for the site (September 25, 2012), monitored natural attenuation continues to be effective in significantly reducing VOC contaminant concentrations in the groundwater, and there are no unacceptable human health or environmental exposures to site contaminants. 2014 groundwater monitoring data confirms that the VOC contaminant levels continue to decrease with time and the cleanup is generally progressing as anticipated in the 1997 ROD.

Site Photos
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Links to Other Site Information
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Disclaimer Instructions about PDF

Newsletters & Press Releases:
Press Releases about this project  

Federal Register Notices:
Final NPL Listing  

Administrative Records:
Administrative Record Index, OU 01 Record of Decision (ROD), September 30, 1997 (840 KB)  

Reports and Studies:
Five Year Review Report, September, 30, 2002 (238KB)  
Second Five Year Review Report, September 28, 2007 (1.21 MB)  
Third Five Year Review Report, September 26, 2012 (12.1 MB)  

Decision Documents:
View Records of Decision (RODS) on-line (EPA HQ)  
Institutional Controls at this Site  

Other Links:
NPL Site Narrative at Listing:  
Site Progress Profile  
Declaration of Environmental Land Use Restriction and Grant of Easement, October 19, 2004 (2.53 MB)  
Declaration of Environmental Land Use and Grant of Easement, August 30, 2005 (1.86 MB)  
Declaration of Environmental Land Use and Grant of Easement, November 07, 2005 (1.9 MB)  

Site Repositories
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Plainfield Public Library, 39 Railroad Avenue, Plainfield, CT 06374

OSRR Records and Information Center, 1st Floor, 5 Post Office Square, Suite 100 (HSC), Boston, MA 02109-3912 (617) 918-1440

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EPA Remedial Project Manager: Leslie McVickar
Address: US Environmental Protection Agency
5 Post Office Square, Suite 100
Mail Code OSRR07-4
Boston, MA 02109 - 3912
Phone #: 617-918-1374
E-Mail Address: mcvickar.leslie@epa.gov

EPA Community Involvement Coordinator: Kate Melanson
Address: US Environmental Protection Agency
5 Post Office Square, Suite 100
Mail Code ORA01-3
Boston, MA 02109 - 3912
Phone #: 617-918-1491
E-Mail Address: melanson.kate@epa.gov

State Agency Contact: William Warzecha
Address: Connecticut Department of Energy and Environmental Protection,
79 Elm Street
Hartford, CT 06106-5127
Phone #: 860-424-3776
E-Mail Address: william.warzecha@ct.gov


Serving Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, Vermont, & 10 Tribal Nations
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Last updated on Wednesday, November 4th, 2015
URL: http://www.epa.gov/region1/superfund/sites/gallup